I recently wrote an article to described in more details the syntax of the IN operator in DAX , which is available in Power BI and in the CTP of the next release of Analysis Services. Jeffrey Wang wrote a blog post about the IN operator a few months ago,  Read more

One of the latest addition to DAX has been the ability to apply an external filter context to SUMMARIZECOLUMNS, which makes this function a perfect replacement for SUMMARIZE in DAX. In The Definitive Guide to DAX I introduced such a function, but at the  Read more

This article explains how to use SUMMARIZECOLUMNS, which is a replacement of SUMMARIZE and does not require the use of ADDCOLUMNS to obtain good performance.  Read more

When you use the time intelligence functions in DAX, it is relatively easy to filter the same dates selection in the previous year by using the SAMEPERIODLASTYEAR or DATEADD functions. However, if you follow the best practices, it is likely that you have  Read more

SSAS Events Analyzer is a simple monitoring system that can be easily applied to any SSAS server with minimal effort.  Free download

SSAS Activity Monitor is an open source tool to monitor the current activity (sessions, transactions, connections, and locks) on an Analysis Services instance. It works for both the Tabular and Multidimensional mode.  Free download

If you work with Power Pivot, Power BI, or Analysis Services Tabular, you probably already know VertiPaq Analyzer. If you never used it, with the new release 1.7 you have another couple of very good reason to try it. VertiPaq Analyzer is a Power Pivot  Read more

VertiPaq Analyzer is useful to analyze VertiPaq storage structures for a data model in Analysis Services Tabular. Learn how to connect VertiPaq Analyzer to Power BI and to SSAS Tabular, and see quick overview of the features available. Then, download…  Watch now

If you think that the end of the year would have been a quiet time because the Power BI team will skip their monthly release (but are we sure?), you might be reassured (or disappointed depending on your perspective) looking at the news I have in this  Read more

This article describes how to implement non-visual-totals with security roles in Power BI and Analysis Services Tabular, which by default show only visual totals of measures in the model.  Read more